1. Pants that are worn by one or more ninjas.
2. Pants that have incredible ninja powers and qualities. (they can grapple-hook onto the white house without being seen!)
3. Pants that once belonged to a ninja but have been stolen by a secret organization of samurai who hate ninjas and their pants because of their supernessness.

The ninja pants saved the world from the evil samurai socks who eat people's stanky feet sauce.